1. Cells: The Living Units
PART 1
Cells: The Living Units

2. Structure of a Generalized Cell
May be used on exams!
Figure 2.1
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3. The Plasma Membrane May be used on exams! Figure 2.2a
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4. The Plasma Membrane
Determines which substances enter or leave the cell
Membrane is selectively permeable
Diffusion – molecules move from a region where they are more concentrated to an area where they are less concentrated
Osmosis – the diffusion of water across a membrane
PLAY
Membrane Structure
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5. Two Types of Endocytosis
Figure 2.3
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6. Exocytosis
This is how cells release hormones, enzymes and extra cellular matrix!
Figure 2.4
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7. The Endoplasmic Reticulum and Ribosomes
Figure 2.5
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8. Assembly of Proteins at the Rough Endoplasmic Reticulum
Figure 2.6
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9. Role of the Golgi Apparatus in Packaging Products of Rough ER
Figure 2.8
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10. More abundant in energy-requiring cells, like muscle cells and sperm
Mitochondria
Mitochondria – generate most of the cell’s energy; most complex organelle
More abundant in energy-requiring cells, like muscle cells and sperm
Figure 2.10
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11. Cytoskeleton: Microtubule
Figure 2.11a
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12. Cytoskeleton: Microfilament
Figure 2.11b
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13. Cytoskeleton: Intermediate Filament
Figure 2.11c
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14. The Nucleus
Figure 2.13
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15. Cells that Connect Body Parts or Cover Organs
Figure 2.16, step 1
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16. Cells that Move Organs and Body Parts
Figure 2.16, step 2
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17. Cells that Store Nutrients and Cells that Fight Disease
Figure 2.16, steps 3–4
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18. Cells that gather information
Cellular Diversity
Cells that gather information
Neuron – has long processes for receiving and transmitting messages
Figure 2.16, step 5
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19. Cellular Diversity Cells of reproduction
Oocyte (female) – largest cell in the body
Contains many copies of organelles for distribution to daughter cells
Sperm (male) – possesses long tail for swimming to the egg for fertilization
Figure 2.16, step 6
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